a {
  text-align: center;
  position: relative;
  display: inline-block;
  padding: 5px 10px;
  color: #03e9f4;
  text-transform: uppercase;
  letter-spacing: 4px;
  text-decoration: none;
  font-size: 20px;
  overflow: hidden;
  transition: .2s;
  margin: 50px 12px;
  -webkit-box-reflect: below 1px linear-gradient(transparent, #0005);
}

.second {
  color: #4effff;
}

.third {
  color: #f571fb
}
.second:hover {
  color: #050801;
  background-color: #4effff;
  box-shadow: 0 0 10px #4effdd, 0 0 40px #4effdd, 0 0 80px #4effff;
}

.third {
  color: #f571fb
}
.third:hover {
  color: #050801;
  background-color: #f571fb;
  box-shadow: 0 0 10px #f571fb, 0 0 40px #f571fb, 0 0 80px #f571fb;
}
a:hover {
  color: #050801;
  background-color: #03e9f4;
  box-shadow: 0 0 10px #03e9f4, 0 0 40px #03e9f4, 0 0 80px #03e9f4;
}

a span {
  position: absolute;
  display: block;
}

a.second span:nth-child(1) {
  background: linear-gradient(90deg, transparent, #4effff);
}

a.third span:nth-child(1) {
  background: linear-gradient(90deg, transparent, #f571fb);
}

a span:nth-child(1) {
  top: 0;
  left: -100%;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, #03e9f4);
  animation: animate1 1s linear infinite;
}

@keyframes animate1 {
  0% {
    left: -100%;
  }

  50%,
  100% {
    left: 100%;
  }
}

a.second span:nth-child(2) {
  background: linear-gradient(180deg, transparent, #4effff);
}

a.third span:nth-child(2) {
  background: linear-gradient(180deg, transparent, #f571fb);
}

a span:nth-child(2) {
  top: -100%;
  right: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, transparent, #03e9f4);
  animation: animate2 1s linear infinite;
  animation-delay: .25s;
}

@keyframes animate2 {
  0% {
    top: -100%;
  }

  50%,
  100% {
    top: 100%;
  }
}

a.second span:nth-child(3) {
  background: linear-gradient(270deg, transparent, #4effff);
}

a.third span:nth-child(3) {
  background: linear-gradient(270deg, transparent, #f571fb);
}

a span:nth-child(3) {
  bottom: 0;
  right: -100%;
  width: 100%;
  height: 2px;
  background: linear-gradient(270deg, transparent, #03e9f4);
  animation: animate3 1s linear infinite;
  animation-delay: .5s;
}

/* a:hover span:nth-child(3) {
  right: 100%;
  transition: 1s;
  transition-delay: .5s;
} */
@keyframes animate3 {
  0% {
    right: -100%;
  }

  50%,
  100% {
    right: 100%;
  }
}

a.second span:nth-child(4) {
  background: linear-gradient(360deg, transparent, #4effff);
}

a.third span:nth-child(4) {
  background: linear-gradient(360deg, transparent, #f571fb);
}

a span:nth-child(4) {
  bottom: -100%;
  left: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(360deg, transparent, #03e9f4);
  animation: animate4 1s linear infinite;
  animation-delay: .75s;
}

@keyframes animate4 {
  0% {
    bottom: -100%;
  }

  50%,
  100% {
    bottom: 100%;
  }
}

/*a:hover span:nth-child(1) {*/
/*  left: 100%;*/
/*  transition: 1s;*/
/*}*/

/*span:nth-child(3) {*/
/*  bottom: 0;*/
/*  right: -100%;*/
/*  width: 100%;*/
/*  height: 2px;*/
/*  background: linear-gradient(270deg, transparent, #03e9f4);*/
/*}*/
/*a:hover span:nth-child(3) {*/
/*  right: 100%;*/
/*  transition: 1s;*/
/*  transition-delay: .5s;*/
/*}*/
/*a:hover span:nth-child(4) {*/
/*  bottom: 100%;*/
/*  transition: 1s;*/
/*  transition-delay: .75s;*/
/*}*/